Ok, so I would have to sign in the 1st time I open the file in QB 2021 and update it.  But only the 1 time, correct?  After that would I be able to use the file without internet access?  Our one option for internet at the office is not the most reliable.

What about a laptop that is not connected to the internet?  I always upgrade with a cd, not a download.  I install on my work desktop and also install on my home computer.  I do not have internet available at home. So, if I cannot log into the Intuit account on that computer, will I be able to open the file at all or will it be stuck on that step?